PDF문서03. Flow control valve.pdf

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Inventor

senior researcher à principal researcher, Tae-gyu Jung

Team

Department of launch vehicle propulsion control

Status of right

• US : 9092032

• JP : 4870799

Title

• FLOW CONTROL VALVE

• FLOW CONTROL VALVE

03

Korea Aerospace Research Institute  Promising Technologies for Commercialization

Outline of Technology

TLO of the KARI

Person-in-charge

Senior Administrator Moon-Hee, Cho

E-mail : moonyxp@kari.re.kr
R&D Performance Diffusion Division 

Flow control 
valve

The technique can control a flow of a desired 
fluid as necessary, and control an amount of flow 
to be maintained constant at all times regardless 

of abrupt system load changes.

Technique for not only adjusting flowrate but 
also maintaining a constant flowrate regardless of  
system load changes

Manufacturing a prototype of ultralight pressure-
compensating control valve by applying the flow 
control technique

<Schematic view of flow control valve>

<Prototype of an ultralight

pressure-compensating flow control valve>


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production of confirmed parts/system and prototype

Technical Readiness Level

TRL 1

TRL 2

TRL 3

TRL 5

TRL 6

TRL 7

TRL 8

TRL 9

TRL 4

Distinctiveness
• Even when a system load of a flow control valve is abruptly changed, an amount of flow is always 

constantly maintained, and a weight and size of the valve is reduced to about a tenth that of the 

conventional technique.

Technical effects
•  Simple constitutions, easy control, less frequent malfunctions

Technical features and advantages

Industrial 

control 

valve of 

Korea(31kg)

Flow control 

valve(3kg)

Technical detail

A prototype is manufactured based on this technique, and a modified technology 

is under development for improving manufacturing efficiency.

• While many conventional researches were conducted on using a mechanical feedback structure 

(mechanical compensation mechanism) to absorb a change in flow to maintain a constant amount 
of flow at all times, no technique has been found so far in which a simple constitution of an 
actuator reduces a weight and maintains a constant flow even when a pressure abruptly changes 
as disclosed in the subject technique.


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03

Technical detail

Flow control valve

• Reduction of a driving force of an actuator leads to its 

size reduction, and therefore the entire valve is reduced in 

weight. Furthermore, an abrupt pressure change occurring 

at an inlet or outlet of the valve is absorbed by a mechanical 

feedback structure (compensation mechanism) so that it is 
possible to maintain a constant flow.

Actuator

A flow control valve precisely 
controls an amount of liquid while 
ensuring a constant flow regardless 
of changes in system loads

Flow control valve

1. Precise flow control

2-1.  Valve parallel to a flow path àResistance 

pressure, operational torque

2-2. Miniature valve can be manufactured

2. Miniaturization/ electronic control

3. Maintaining of suitable flow

• The global market of industrial valves and actuators was 

28.1 trillion won in 2015, and is expected to reach 40.6 
trillion won in 2021. A market of specific valves will reach 
about 4 trillion won, which is a tenth of the global market. 

• The market of specific valves is monopolized by a few 

companies in the United States, Europe, and Japan.

Classification

Reference

Estimation

2015

2016

2017

2018

2019

2020

2021

Marker

(Unit 

hundred 

millionwon)

Size

238,448

252,667

267,981

283,294

299,701

317,202

335,796

Growth 

rate

5.87%

5.87%

5.87%

5.87%

5.87%

5.87%

5.87%

Market and future prospect


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Applications

• Applicable to various fields of industrial valves such as marine shipbuilding, aviation, plants, 

construction, mechanics, etc.

Industrial 

control 

valve of 

Korea(31kg)

Flow control 

valve(3kg)

Replacement of previously installed product

Flow control valve

Performance

enhancement

A market size of 28

tnillion won

(as of 2015)